Add Niri, a scrolling tiling window manager.

modules/system/programs/default.nix

@@ -3,12 +3,12 @@
   imports = [
     ./backlights
     ./dconf
+    ./desktops
     ./gaming
     ./git
+    ./greetd
     ./nh
-    ./qt
     ./security
     ./shells
-    ./sway
   ];
 }

modules/system/programs/desktops/default.nix

@@ -0,0 +1,11 @@
+{ config, lib, ... }:
+{
+  programs = {
+    sway.enable = config.system.desktop.enable;
+    niri.enable = config.system.desktop.enable;
+    xwayland.enable = lib.mkForce config.system.desktop.enable;
+  };
+
+  services.dbus.enable = config.system.desktop.enable;
+  security.pam.services.swaylock = {};
+}

modules/system/programs/greetd/default.nix

@@ -1,22 +1,6 @@
 { config, pkgs, ... }:
 {
-  # Configure greetd for login directly to Sway
-  services.greetd = let
-    startSway = pkgs.writeScript "startsway" ''
-      if ${pkgs.pciutils}/bin/lspci -k | grep "in use: nvidia" &> /dev/null; then
-        export LIBVA_DRIVER_NAME=nvidia
-        export GBM_BACKEND=nvidia-drm
-        export __GLX_VENDOR_LIBRARY_NAME=nvidia
-      else
-        :
-      fi
-
-      export XDG_CURRENT_DESKTOP=sway
-      export QT_QPA_PLATFORM="wayland;xcb"
-
-      sway --unsupported-gpu
-    '';
-  in {
+  services.greetd = {
     enable = config.system.desktop.enable;
     restart = true;
     settings = {
@@ -24,10 +8,32 @@
         vt = 2;
         switch = true;
       };
-      default_session = {
-        command = "${startSway}";
-        user = "jimbo";
-      };
+      default_session.command = "${pkgs.cage}/bin/cage -d -m last ${pkgs.greetd.gtkgreet}/bin/gtkgreet";
     };
   };
+
+  environment.etc."greetd/environments".text = let
+    initScript = ''
+      if ${pkgs.pciutils}/bin/lspci -k | grep "in use: nvidia" &> /dev/null; then
+        export LIBVA_DRIVER_NAME=nvidia
+        export GBM_BACKEND=nvidia-drm
+        export __GLX_VENDOR_LIBRARY_NAME=nvidia
+      else
+        :
+      fi
+    '';
+  in ''
+    ${pkgs.writeScript "startsway" ''
+      ${initScript}
+      export QT_QPA_PLATFORM="wayland;xcb"
+      export XDG_CURRENT_DESKTOP=sway
+      sway --unsupported-gpu
+    ''}
+    ${pkgs.writeScript "startniri" ''
+      ${initScript}
+      export QT_QPA_PLATFORM=wayland
+      export XDG_CURRENT_DESKTOP=niri
+      niri-session
+    ''}
+  '';
 }

modules/system/programs/qt/default.nix

@@ -1,8 +0,0 @@
-{ config, ... }:
-{
-  qt = {
-    enable = config.system.desktop.enable;
-    style = "gtk2";
-    platformTheme = "gtk2";
-  };
-}

modules/system/programs/sway/default.nix

@@ -1,12 +0,0 @@
-{ config, pkgs, ... }:
-{
-  imports = [ ./greetd ];
-
-  programs.sway = {
-    enable = config.system.desktop.enable;
-    extraPackages = with pkgs; [ swaylock ];
-  };
-
-  services.dbus.enable = config.system.desktop.enable;
-  security.pam.services.swaylock = {};
-}